我有这两个有状态的小部件Page1和Page2。 我试图在触发转换后立即使第二页显示在第一页上,并且没有任何滚动,淡入或任何效果。我该怎么办?
答案 0 :(得分:0)
Replace initial Route in MaterialApp without animation?
import 'package:flutter/material.dart';
void main() {
runApp(new MyApp());
}
class MyCustomRoute<T> extends MaterialPageRoute<T> {
MyCustomRoute({ WidgetBuilder builder, RouteSettings settings })
: super(builder: builder, settings: settings);
@override
Widget buildTransitions(BuildContext context,
Animation<double> animation,
Animation<double> secondaryAnimation,
Widget child) {
if (settings.isInitialRoute)
return child;
// Fades between routes. (If you don't want any animation,
// just return child.)
return new FadeTransition(opacity: animation, child: child);
}
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Navigation example',
onGenerateRoute: (RouteSettings settings) {
switch (settings.name) {
case '/': return new MyCustomRoute(
builder: (_) => new MyHomePage(),
settings: settings,
);
case '/somewhere': return new MyCustomRoute(
builder: (_) => new Somewhere(),
settings: settings,
);
}
assert(false);
}
);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Navigation example'),
),
drawer: new Drawer(
child: new ListView(
children: <Widget> [
new DrawerHeader(
child: new Container(
child: const Text('This is a header'),
),
),
new ListTile(
leading: const Icon(Icons.navigate_next),
title: const Text('Navigate somewhere'),
onTap: () {
Navigator.pushNamed(context, '/somewhere');
},
),
],
),
),
body: new Center(
child: new Text(
'This is a home page.',
),
),
);
}
}
class Somewhere extends StatelessWidget {
Widget build(BuildContext context) {
return new Scaffold(
body: new Center(
child: new Text(
'Congrats, you did it.',
),
),
appBar: new AppBar(
title: new Text('Somewhere'),
),
drawer: new Drawer(
child: new ListView(
children: <Widget>[
new DrawerHeader(
child: new Container(
child: const Text('This is a header'),
),
),
],
),
),
);
}
}